<template>
  <div class="login">
    <div class="login-form">
      <h3 class="title">电磁信号离线分析平台</h3>
      <el-form ref="loginRef" :model="loginForm" :rules="loginRules">
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            type="text"
            size="large"
            auto-complete="off"
            placeholder="账号"
          >
            <template #prefix>
              <svg-icon
                icon-class="user"
                class="el-input__icon input-icon"
              />
            </template>
          </el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            type="password"
            size="large"
            auto-complete="off"
            placeholder="密码"
            @keyup.enter="handleLogin"
          >
            <template #prefix>
              <svg-icon
                icon-class="password"
                class="el-input__icon input-icon"
              />
            </template>
          </el-input>
        </el-form-item>
        <el-form-item v-if="captchaEnabled" prop="code">
          <el-input
            v-model="loginForm.code"
            size="large"
            auto-complete="off"
            placeholder="验证码"
            style="width: 63%"
            @keyup.enter="handleLogin"
          >
            <template #prefix>
              <svg-icon
                icon-class="validCode"
                class="el-input__icon input-icon"
              />
            </template>
          </el-input>
          <div class="login-code">
            <img :src="codeUrl" class="login-code-img" @click="getCode">
          </div>
        </el-form-item>
        <el-form-item>
          <el-checkbox v-model="loginForm.rememberMe">记住密码</el-checkbox>
        </el-form-item>
        <el-form-item style="width: 100%">
          <el-button
            :loading="loading"
            size="large"
            type="primary"
            style="width: 100%"
            @click.prevent="handleLogin"
          >
            <span v-if="!loading">登 录</span>
            <span v-else>登 录 中...</span>
          </el-button>
          <div v-if="register" style="float: right">
            <router-link class="link-type" :to="'/register'">立即注册</router-link>
          </div>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script setup>
  import { getCodeImg } from '@/api/login'
  import Cookies from 'js-cookie'
  import { encrypt, decrypt } from '@/utils/jsencrypt'
  import useUserStore from '@/store/modules/user'

  const userStore = useUserStore()
  const router = useRouter()
  const { proxy } = getCurrentInstance()

  const loginForm = ref({
    username: '',
    password: '',
    rememberMe: false,
    code: '',
    uuid: ''
  })

  const loginRules = {
    username: [{ required: true, trigger: 'blur', message: '请输入您的账号' }],
    password: [{ required: true, trigger: 'blur', message: '请输入您的密码' }],
    code: [{ required: true, trigger: 'change', message: '请输入验证码' }]
  }

  const codeUrl = ref('')
  const loading = ref(false)
  // 验证码开关
  const captchaEnabled = ref(true)
  // 注册开关
  const register = ref(false)
  const redirect = ref(undefined)

  function handleLogin() {
    proxy.$refs.loginRef.validate(valid => {
      if (valid) {
        loading.value = true
        // 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
        if (loginForm.value.rememberMe) {
          Cookies.set('username', loginForm.value.username, { expires: 30 })
          Cookies.set('password', encrypt(loginForm.value.password), {
            expires: 30
          })
          Cookies.set('rememberMe', loginForm.value.rememberMe, { expires: 30 })
        } else {
          // 否则移除
          Cookies.remove('username')
          Cookies.remove('password')
          Cookies.remove('rememberMe')
        }
        // 调用action的登录方法
        userStore
          .login(loginForm.value)
          .then(() => {
            router.push({ path: redirect.value || '/' })
          })
          .catch(() => {
            loading.value = false
            // 重新获取验证码
            if (captchaEnabled.value) {
              getCode()
            }
          })
      }
    })
  }

  function getCode() {
    getCodeImg().then(res => {
      captchaEnabled.value = res.captchaEnabled === undefined ? true : res.captchaEnabled
      if (captchaEnabled.value) {
        codeUrl.value = 'data:image/gif;base64,' + res.img
        loginForm.value.uuid = res.uuid
      }
    })
  }

  function getCookie() {
    const username = Cookies.get('username')
    const password = Cookies.get('password')
    const rememberMe = Cookies.get('rememberMe')
    loginForm.value = {
      username: username === undefined ? loginForm.value.username : username,
      password: password === undefined ? loginForm.value.password : decrypt(password),
      rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
    }
  }

  getCode()
  getCookie()
</script>

<style lang="scss" scoped>
  .login {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    background: url('../assets/images/loginbgbg.png') center no-repeat fixed;
    background-size: cover;
  }
  .title {
    text-align: center;
    margin-bottom: 1em;
    color: #fff;
    font-size: 24px;
  }

  .login-form {
    border-radius: 6px;

    width: 400px;
    margin-left: 30%;

    .el-form {
      background: rgba(255, 255, 255, 0.2);
      padding: 30px;
      padding-bottom: 10px;
    }
    .el-input {
      height: 40px;
      input {
        height: 40px;
      }
    }
    .input-icon {
      height: 39px;
      width: 14px;
      margin-left: 0px;
    }
  }
  .login-tip {
    font-size: 13px;
    text-align: center;
    color: #bfbfbf;
  }
  .login-code {
    width: 33%;
    height: 40px;
    float: right;
    img {
      cursor: pointer;
      vertical-align: middle;
    }
  }
  .el-login-footer {
    height: 40px;
    line-height: 40px;
    position: fixed;
    bottom: 0;
    width: 100%;
    text-align: center;
    color: #fff;
    font-family: Arial;
    font-size: 12px;
    letter-spacing: 1px;
  }
  .login-code-img {
    height: 40px;
    padding-left: 12px;
  }
</style>
